class_docstr: Test FASTALoader
code: def test_fasta_one_hot(self):
      input_file = os.path.join(self.current_dir, "example.fasta")
      loader = dc.data.FASTALoader(legacy=False)
      sequences = loader.create_dataset(input_file)
  
      # Due to FASTALoader redesign, expected shape is now (3, 58, 5)
  
      assert sequences.X.shape == (3, 58, 5)
  
file_path: deepchem/deepchem/data/tests/test_fasta_loader.py
imports: import os
  import unittest
  import deepchem
  from deepchem.feat.molecule_featurizers import OneHotFeaturizer
label_desc: Use image node_id 3 for calling the TestFASTALoader obj's underlying member method code with example usage: obj.test_fasta_one_hot() without return types